THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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SOLR-14615 –- CPU Based Circuit Breaker
SOLR-14537 -- Improve performance of ExportWriter
SOLR-14651 -- The MetricsHistoryHandler Can Be Disabled
A summary of important changes is published in the Solr Reference Guide at https://lucene.apache.org/solr/guide/8_7/solr-upgrade-notes.html. For the most exhaustive list, see the full release notes at https://lucene.apache.org/solr/8_7/changes/Changes.html or by viewing the CHANGES.txt file accompanying the distribution. Solr's release notes usually don't include Lucene layer changes. Lucene's release notes are at https://lucene.apache.org/core/8_7/changes/Changes.html